Add gpu command buffer support for loseContextCHROMIUM

content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc

Index: content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
diff --git a/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc b/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
index fcd7f6651858e073dfba0925c5627cbf4afc5cc7..0fb0cd24553f34d9ada22376bad47a1dd2a9e0ac 100644
--- a/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
+++ b/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
@@ -1553,6 +1553,12 @@ void WebGraphicsContext3DCommandBufferImpl::signalQuery(
       base::Bind(&SignalSyncPointCallback, base::Passed(&own_callback)));
 }
 
+void WebGraphicsContext3DCommandBufferImpl::loseContextCHROMIUM(
+    WGC3Denum current, WGC3Denum other) {
+  gl_->LoseContextCHROMIUM(current, other);
+  gl_->Flush();
+}
+
 void WebGraphicsContext3DCommandBufferImpl::genMailboxCHROMIUM(
     WGC3Dbyte* name) {
   std::vector<gpu::Mailbox> names;